---
id: 5375
title: "How to Prevent Flash Loan Attacks in DeFi"
source_domain: hackenproof.com
source_url: "https://hackenproof.com/blog/prevent-flash-loan-attacks-defi"
published_at: "2026-06-11 06:51"
tags: ["web3", "vulnerability-research", "defi", "price-manipulation", "hackenproof", "defi-security", "flash-loan", "beanstalk"]
phying_url: "https://phying.com/item/5375"
lang: en
---

# How to Prevent Flash Loan Attacks in DeFi

## Summary

How flash loan attacks work in DeFi: borrowing uncollateralized funds inside one block to manipulate prices, arbitrage or trigger liquidations, then repaying — the $182M Beanstalk Farms exploit.

## Intelligence Metadata

- **Sources:** hackenproof.com
- **Published:** 2026-06-11 06:51
- **Original:** https://hackenproof.com/blog/prevent-flash-loan-attacks-defi
- **Phying News:** https://phying.com/item/5375